Sliding window of motor and other vehicles



June 7, 1927.

J. M. STRACHAN SLIDING WINDOW OF MOTOR AND OTHER VEHICLES Filed July .5, 1924 IIM'I 2 Sheets-Sheet 1 anew/7f 5 A from 5 f 1,631,775 June 1927' J. M. STRACHAN SLIDING WINDOW OF MOTOR AND OTHER VEHICLES Filed July 5. 1924 2 Sheets-Sheet 2 a} Fig.2. 5 a] Fig.5.

Patented June 7, 1927.

UNITED STATES PATE-NTPOFFICE. 1

JAMES MARSHALL s'rnacnaiv, OF NORTH Aaron, LONDON, ENGLAND.

SLIDING WINDOW OF' MOTOR AND'OTHER VEHICLES.

Application filed July 5, 1924, Serial No. 724,431, and in Great Britain August 28, 1923.

This invention relates to the windows of omnibuses and other like vehicles and has for its object to provide a simple and efficient means of ,counterbalancing such windows that can be adjusted to suit the weight of different windows and to compensate for the loss of energy in the counter-balancing means, also to provide a simple and eficient means of maintaining the window in the position to which it has beenraised or lowered and of releasing the same. I I

The present invention consists in providing the window frame with one or more spring operated windlasses upon'which are wound cords or equivalent parts whose outer ends are secured to the sash guides, in providing the edges of the window frame that travel in the guides with parallel plates that are normally urged apart and means for moving the said plates towards each other when it is desired to lower the window.

According to one mode of carrying my invention into practice I provide the lower horizontal member of thewindow frame with a recess between its faces'that extends upwards for a sufficient distance fromrits lower edge to accommodate a Windlass comprising a drum mounted freely on an arbor journalled between two platesmaintained at a suitable distance apart. wound spring is connected to the aforesaid drum and the other to the arbor which vis provided with means of turningit with or without a key for the purpose of adjusting the tension of the spring. Means such as a ratchet and pawl are also provided to maintain said arbor in the adjusted position;

One end of each of two cords are secured to the drum and the other ends are led along channels in the lower and side edges of the.

window and around guide pulleys-to the sash guides on opposite sides of the window to which they are secured and the tension on the spring is adjusted to as nearly as possible counterbalance the window.

To the corners formed by the vertical sides I and the front and back faces of the window frame I apply angle plates.v One of each pair of these angle plates on. each sideof the window is secured to the window frame and the other is linked to its fellow in such a way as to insure their parallelism in all positions and to cause thedistance between them to .beincreased when the movable member is raised or the other one lowered so -as tenor w ly cau e the win ow o b d in the sa One end of a guides. Iii-order to urge these plates away from each other the movable one is normally raised by aspring while gravity tends to move the other in the opposite direction.

NVit-h this arrangement the angle plates are moved sufliciently nearer to each other when the window. frameis raised to allow it to slide in its guides but in order to lower the window the movable plate must be first lowered. For this purpose a horizontal shaft is mounted in bearings in a groove at the top .of the window frame and is provided with a lever adjacent to the finger or lifting plate by means of which the window can be raised or lowered. This shaft is also provided with short arms at its extremities whose ends are connected to the movable plates by links or equivalent means in. such a way that the said plates are lowered when I will now proceed to more particularly describe my invention with the aid of the accompanying drawings in whicha Fig. 1 is a front elevation of the door of a vehicle viewed from the inside, to the win dow of which the present improvements have been applied, 1 .7

Fig. 2 is a front elevation of the window frame shown in Fig. l and its guides removedfrom the door, V I

Fig. 3 is a horizontal section through the door shown in Fig. 1, injthejplane indicated by thebroken line 33 in that figure,

. Fig.4: is a sideelevation of the window Fig. 6 is a vertical scction through the door shown in Fig. 1- with the window removed, showing one of the removable guides and the end of one of the flexible cords of the counter-balancing mechanism and Fig/7 isa vertical section :through part of the window frame of a door illustrating a modified construction hereinafter referred to. I

Accordingqto the construction shown III the -.drawings the window-framed is providedwith angle-plates 'b 0 at each of the corners formed by the intersection of its vertical sides, with itsback and front faces. [The angle-plates b are respectively secured to th eyrea-r corner oneach side of the Winill sq pivoted to one of the plates 0.

dow frame by screws d and each of the anglesplates c is connected to its fellow angle-plate Z) by parallel links 6 pivoted to both of them. The angle-plates on each side of the window-frame are normally'urged apart by a spring (not shown) contained in the tube f pivoted to a lug g on the angleplate 6. This spring acts ona plunger it that engages a lug 2' on the other angle-plate c causing it to move away from the angleplate 6.

The angle plat-es b 0 on both sides of :the window frame are=adapted to slide in guides 7' when free to do so. Each of these guides is removably supported in :the window opening of the door 7s by a screw Z whichenables the lower ends to be moved towards the outer ledge when the window is closed.

In orderyto (facilitate the closing of the window, spring-operated windlasses are :supvported in recesses formed between the faces of the window frame a. Each of these windlasses comprises a hollow drum m mounted rotatably on a pivot 12 journalled between plates 0 whose outer surfaces are flush with the window-frame. The;opposite ends of wound springs (not shown) are respectively connected to each drum and its pivot which may be rotated to adjust the tension on its spring and such adjustment is maintained by a ratchet wheel 22 and a pawl The ends of flexible cordsr are respectively secured to each of'the guides j and to the periphery of theadjacent drums m wliosesprings tend to wind them up and so partly counterbalance the window. To "facilitate the at tachment of the cords a" to theguidesithe latter are provided with key-hole slots .9 to receive a flat 'head t formed on the horizontal to the'p'ositi'ons shown in'the drawings.

In order to raise or lower the window it is necessaryto release the grip on the guides by lowering the angle-plate c for which purpose a spring-controlled horizontal shaft z is mounted in bearings a in a groove 1 at i, the top of the window-frame a. This shaft is provided with short arms 2 at both ends that extend into'transverse groovesj3 formed in the said angle-plates in order'that longitudinal movement may be imparted to them when the shaft 1 is turned. Theshaft y is also provided with a third arm eat or near itscentre above a lifting plate 5. This arm of *the window openingwhen the window is closed so as to exclude rain and draught.

Springs 9 are provided to normally urge the lower ends of the guides j 'and'the Window away from the knife edge 8 to enable the latter to be lowered when desired.

-According to an alternative construction the guides 7' fit the groovew in the window opening which prevents them from swinging and in order to exclude rain and draught when the window is closed it is provided with a strip 10 of rubber or otheryielding impervious material having an inclined "surfa'cetliat is brought intocontact with a knife edge 11 when the window is closed.

I claim: 1. An improved sliding window for ino- 'tor and other vehicles comprising a window sash and adjustable counterbalancing means constituted by one or more windlasses each consisting of a frame secured to the window sash; 'a pivot in said frame on which a drum 1 is 'journalled; a wound spring surrounding said pivot and connected to it at one 'end and to the drum at the other; flexible members secured at one end to said drum or drums around which such I flexible members are wound and secured at their other extremities to the window guide on each side of the window; means of turning the drum pivot in one direction-to adjust the tension of its spring and a ratchet-wheel mounted on said'pivot adapt ed'tocooperate with a pawl "to prevent its rotation in the reverse direction substantially as and forthe purpose set forth.

'2. An improved sliding window for inotors andother vehicles according to claim 1 having expansible edges adapted to grip the window guides to maintain thewindow in aniadjustedposition and to slide therein whencontrac'ted' also means of-contract ng said-edges substantiallyas set forth;

3. An improved sliding window for motors and other vehicles according 'to' claim 1 having expansible edges each of which comprises two angle-plates, one of which is secured to the Window frame and the other connected to the fixed one by links pivoted to each, a spring to urge the angle-plates apart and hand-operated means to urge them together substantially as and "for the purpose set forth.

4p An improved sliding window for motors "and other vehicles according-to claim 1; having expa'ns'ible edges, each of which coin prises two 'angle plates, one of which is secured to the window-frame and the other connected to the fixed one by links pivoted to each, a spring to urge the angle-plates apart, means for urging the movable angleplate towards the fixed one so as to con tract the edge of the Window-frame comprising a horizontal shaft having arms at its extremities adapted to engage slots in said movable angle-plates and another arm adapted to turn said shaft in the direction to contract the edges of the window substanmounted on said pivot adapted to co-operate with a pawl to prevent its rotation intially as set forth.

5. An improved sliding window for I100- tors and other vehicles according to claim 1 having expansible edges removable guides in which said expansible edges are adapted to slide and means of securing said guide;

within the window opening so as to enable a lip at the lower edge of the window to engage and be disengaged from a knife edge fixed to the window ledge substantially as described in the specification.

6. An improved sliding window for motor and other vehicles comprising a window sash and adjustable counterbalancing means constituted by one or more windlasses each consisting of a frame secured to the wlndow sash; a plvot 1n said frame on flexible members secured at one end to said drum or drums around which such flexible members are wound and secured at their other extremities to the window guide on each side of the window; means of turning the drum pivot in one direction to adjust the tension of its spring; a ratchet-Wheel the reverse direction; removable window guides adapted to fit grooves in the Window opening in which they are held stationary by removable beadings; a strip of impervious elastic material ,near the lower edge of the window; an inclined surface to said strip and an edge near the bottom of the window opening engaged by said strip when the window is closed to exclude rain and draught substantially as set forth.

In testimony whereof, I have si ned my name to this specification at 18 Cavendish Square, London, England, this th day of June, 1924.

JAMES MARSHALL STRACHAN. 

